Spatial distribution of heavy metals in soil, water, and vegetables of farms in Sanandaj, Kurdistan, Iran

Journal of Environmental Health Science Engineering

Amir Hossein Mahvi⁴  Shiva Zandi²  Shahrokh Nazmara¹  Hassan Amini³  Afshin Maleki² 

[1] Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran;Kurdistan Environmental Health Research Center, Kurdistan University of Medical Sciences, Sanandaj, Iran;University of Basel, Petersplatz 1, Basel, 4003, Switzerland;Center for Solid Waste Research (CSWR), Institute for Environmental Research (IER), Tehran University of Medical Sciences, Tehran, Iran

关键词: Water;    Vegetables;    Soil;    Radish;    Mapping;    Iran;    Heavy metals;    GIS;    Dill;    Coriander;   

Others  :  1175284
DOI  :  10.1186/s40201-014-0136-0

 received in 2014-01-16, accepted in 2014-10-29,  发布年份 2014

【 摘 要 】

Background

Heavy metals are ubiquitous elsewhere in nature and their measurement in environment is necessary to develop health management strategies. In this study, we aimed to find out concentrations and spatial patterns of heavy metals in main farms of Sanandaj in Kurdistan, Iran.

Methods

Over May to October 2012, six farms were selected to analyze concentrations and spatial patterns of several heavy metals, namely aluminum (Al), arsenic (As), cadmium (Cd), cobalt (Co), chromium (Cr), copper (Cu), nickel (Ni), lead (Pb), and zinc (Zn) in their soil, irrigation water, and edible vegetables. Overall, 36 samples of soil and water and 72 samples of vegetables including coriander (Coriandrum sativum), dill (Anethum graveolens), radish (Raphanus sativus) root and radish leaf were collected. The concentrations of metals were determined by inductively coupled plasma optical emission spectrometry. The spatial surfaces of heavy metals were created using geospatial information system.

Results

The order of metals in soil was Al?>?Zn?>?Ni?>?Cu?>?Cr?>?Pb?>?Co?>?As?>?Cd while in water it was Cr?>?Co?>?Zn?>?Pb?>?Cu?>?Ni?>?Al?=?As?=?Cd. The order of heavy metals in vegetables was Al?>?Zn?>?Cu?>?Cr?>?Ni?>?Pb?>?Co?>?As?>?Cd. Totally, the minimum concentrations of Al, Cu, Pb, and Zn were found in radish root while the maximum of Al, Co, Cr, and Ni were found in radish leaf. The minimum concentrations of Cd and Cr and maximum concentrations of Cu and Zn were also deciphered in dill. Noteworthy, coriander had the minimum concentrations of Co and Ni. The concentrations of Cr and Pb in vegetables were more than maximum allowable limits of the Food and Agriculture Organization (FAO) and the World Health Organization (WHO).

Conclusion

In summary, albeit the concentrations of heavy metals in soil and water samples were below FAO and the WHO standards, vegetables were contaminated by chromium and lead.

【 授权许可】

   
2014 Maleki et al.; licensee BioMed Central Ltd.

【 图 表 】

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